Reproducibility of Dual-Energy X-ray Absorptiometry Measurements in Prepubertal Girls
1998
Objective: Regulation of growth and development, clinical assessment, and obesity are among the areas of nutritionrelated research, wherein accurate assessment of body composition is important. We want to test the hypothesis that dual-energy X-ray absorptiometry (DXA) measurements are reproducible in healthy girls.
Research Methods and Procedures: We determined total body composition measurements in healthy prepubertal girls using DXA twice, 6 weeks apart.
Results: We studied 61 healthy, normal-weight, prepubertal girls, aged 4.8 years to 10.3 years. The girls' DXA-derived mean weight between visits 1 and 2 significantly increased (27.14 kg vs. 27.80 kg, P<0.0001). The increased weight was due to significant increases in total body fat-free mass (FFM) (19.53 kg vs. 19.89 kg,Pcomposition studies in girls aged 5 years to 10 years.
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